Looking for logging into the Lync 2013 Sign Up site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Lync 2013 Sign Up site. After that you can login as usual with your login credentials.
https://support.office.com/en-us/article/sign-in-to-and-out-of-lync-61867078-d794-428a-9b92-25767476163e
https://social.technet.microsoft.com/Forums/ie/en-US/6ac05314-9f16-4cfa-9c7c-68db2e1c08c7/how-do-i-create-a-personal-lync-account%3Fforum%3Docsmanagement
https://www.youtube.com/watch%3Fv%3D-ZN1AJGUioo
https://www.youtube.com/watch%3Fv%3DW8XyFRaC_oc
https://www.youtube.com/watch%3Fv%3D9jpzcp6YKOs
https://www.theregister.co.uk/2013/05/30/microsoft_links_skype_to_lync/
http://www.google.fr/url?url=http://support.sherweb.com/Faqs/Show/how-to-create-a-user-with-microsoft-lync-2010
https://liberty.service-now.com/ess/kb_view.do%3Fsys_kb_id%3D8f68ebf26906e140f47c0482f91900ae%26sysparm_nameofstack%3D%26sysparm_kb_search_table%3D
http://www.google.fr/url?url=http://kb.mcgill.ca/KB/article/2-5419.html
http://www.google.fr/url?url=http://skype4businessinsider.com/instant-messaging/doubling-up-does-lync-allow-multiple-logins/
https://greiginsydney.com/a-free-basic-client-for-lync-2013/
https://www.quora.com/How-can-I-sign-in-to-multiple-accounts-in-Microsoft-Lync
https://community.polycom.com/t5/VoIP-SIP-Phones/Unable-to-register-a-VVX500-to-LYNC-2013/td-p/40314